NEONATAL MULE DEER FAWN SURVIVAL IN WEST-CENTRAL COLORADO

Autor:	Thomas M. Pojar, David C. Bowden
Rok vydání:	2004
Předmět:	Survival period Animal science Ecology biology General Earth and Planetary Sciences Mean age Odocoileus biology.organism_classification Ecology Evolution Behavior and Systematics Nature and Landscape Conservation General Environmental Science Demography Predation
Zdroj:	Journal of Wildlife Management. 68:550-560
ISSN:	1937-2817 0022-541X
DOI:	10.2193/0022-541x(2004)068[0550:nmdfsi]2.0.co;2
Popis:	Declining mule deer (Odocoileus hemionus) populations resulting from apparent low recruitment brought management and political focus on neonatal fawn survival. We captured mule deer fawns on the Uncompahgre Plateau (5,957 km2) in west-central Colorado, USA, at a mean age of 3 days (range = newborn to 6 days), and we radiomarked them with mortality-sensing, drop-off radiocollars. We radiomarked 230 fawns with samples of 50 in 1999, 88 in 2000, and 92 in 2001. Designated neonate survival period was from capture to 14 December. Survival was different among years (χ22 = 6.160, P = 0.046) with 3-year mean survival of 0.501. Cause-specific mortality ordered from highest to lowest was sick/starve, coyote, unknown, trauma, bear, and feline. Neither all predation combined (coyote, bear, feline; P = 0.379) nor coyote predation alone (P > 0.989) differed among years. By 31 July, 74% of the sick/starve mortality and 75% of the predation mortality had taken place, with 76% of mortality from all sources occurr...
Databáze:	OpenAIRE
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